Ec_agnd signal

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  • kadi144
    Badcaps Veteran
    • Aug 2015
    • 690
    • algerie

    #1

    Ec_agnd signal

    hello!

    i need to know what is this signal EC_AGND

    in lenovo G50-70
    THE shematics is here
    https://www.badcaps.net/forum/showth...ighlight=aclu2


    page 44

    THANKS
  • BlueMidnight
    Badcaps Veteran
    • Jan 2015
    • 489
    • United States

    #2
    Re: Ec_agnd signal

    That is the analog ground for the EC. Digital signals are noisier and can transfer noise to analog signals using the same ground. This is why you will often see separate analog and digital grounds. They have to be connected together on the board somewhere (there can ultimately only be one ground), but it will be on the outside of the chip and not inside.

    Comment

    • kadi144
      Badcaps Veteran
      • Aug 2015
      • 690
      • algerie

      #3
      Re: Ec_agnd signal

      Originally posted by BlueMidnight
      That is the analog ground for the EC. Digital signals are noisier and can transfer noise to analog signals using the same ground. This is why you will often see separate analog and digital grounds. They have to be connected together on the board somewhere (there can ultimately only be one ground), but it will be on the outside of the chip and not inside.
      thanks

      i have the IT8586E very hot and the laptop is dead

      Comment

      • kadi144
        Badcaps Veteran
        • Aug 2015
        • 690
        • algerie

        #4
        Re: Ec_agnd signal

        i think that is damged
        it s short with the ground

        Comment

        • BlueMidnight
          Badcaps Veteran
          • Jan 2015
          • 489
          • United States

          #5
          Re: Ec_agnd signal

          It shouldn't be getting very hot, so yes it might have a short. If it is the only bad chip, it can be replaced. But, the IT8586E has internal memory for the EC firmware. It must be programmed with a special tool.

          Comment

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